This page is meant to describe ways to update the BIOS on a ThinkPad that only runs Linux for users that don't have ready access to Windows. If you have Windows on your ThinkPad you can just boot into it and follow instructions on the Lenovo website.

Updating the BIOS in Linux (with few exceptions) is not officially supported by Lenovo. However there are work arounds.

ATTENTION!

By following any of the instructions here you are accepting the very real risk of turning your ThinkPad into a big expensive paper weight, as a firmware update gone wrong can create unfix-able problems.
Proceed at your own risk!

Downloading New Firmware

ATTENTION!

Flashing the wrong firmware for your hardware may cause permanent damage to your ThinkPad. It is up to you to confirm that the firmware you are using is correct.

The BIOS Utility and Bootable CD packages combine the BIOS and ECP firmwares. For the other packages, there is one for each firmware.

Help needed

Can an image be extracted from a "Linux diskette" .exe file?

The Linux diskette is just the Diskette package that runs on Linux instead of Windows/DOS. It's unknown if a boot image can be extracted from it.

You may need to try different packages to find the one from which you can extract a boot image.

Two Firmwares: BIOS and ECP

ATTENTION!

Flashing incompatible firmwares, or flashing them in the wrong order, may cause permanent damage to your ThinkPad.

It is important to understand that Thinkpads from IBM have two separate firmwares: the BIOS, and the Embedded Controller Program (ECP).

A given BIOS version will require a certain version of the ECP. You must read the Lenovo website and/or .txt files to confirm which BIOS is compatible with which ECP, and the order in which to update them.

Update Order

The IBM documentation is sometimes unclear about the order in which these two firmwares should be updated. When in doubt (i.e. IBM didn't provide specific instructions for your model or a particular firmware update), update the ECP first, and then the BIOS. Also, make sure to do the two updates immediately one after the other.

The EC firmware is usually much better at backwards compatibility than the BIOS.

(Updaters for newer models take care of both BIOS and EC, and use automatically whatever sequence is needed, so you don't have to worry about it.)

Installed Firmware

You can check the current BIOS and ECP versions on your ThinkPad by using dmidecode. For example:

DMI IDs

Updating Firmware

There are two basic steps to updating the firmware (either the BIOS or the ECP) on a ThinkPad not running Windows:

Extract a bootable update image

Boot from that image

Extracting an update image

ATTENTION!

Though this process has been successfully tested on many versions of .exe files found on IBMs website, that doesn't mean it will work for all of them. Proceed at your own risk. Consult the testing tables farther down of this page to see other users' experience with your model Thinkpad.

NOTE!

These EXE unpack procedures no longer work on more recent downloads, as Lenovo has changed the packaging format. You may still be able to unpack them using wine, or alternatively an actual (virtual) Windows machine.

Older .exe installers from Lenovo mostly appear to be just a wrapper license program around Windows .cab files (see BIOS-Bootsplash). If you install the Linux program cabextract you can expand these .cab files directly. For example, if you downloaded 1iuj13us.exe from Lenovo:

The file we want is FILENAME.IMG, with "FILENAME" being the .exe. you downloaded. E.g., 1IUJ13US.IMG.

(If this does not work for the Non-diskette .exe, try it on the Diskette .exe. It's reported, for example, that the Non-diskette .exe for BIOS version 3.23 for the T41p was not extractable, but the Diskette .exe worked perfectly, with $ cabextract delivering a .IMG file.)

Testing the Image

You can test that FILENAME.IMG is really a floppy image by running:

# mkdir /tmp/mntfloppy

# mount -o loop FILENAME.IMG /tmp/mntfloppy

If a ls command on the image returns what looks like a DOS floppy, and no read errors were displayed, you have a pretty good chance that the image is usable. For example:

Booting from a CD

If there is a Bootable CD image available, e.g., FILENAME.iso, just download that, instead of mucking around with image files.

If you are going to update the firmware by booting from a CD, you need to turn FILENAME.IMG that you extracted above into an .iso file.

The El Torito Bootable CD Specification is a wonderful thing. Thanks to it, a bootable CD can be made with a bootable floppy image in such as way that the CD believes that it is a 2.88 MB floppy drive. This allows you to replace a boot floppy by a boot CD in nearly all situations.

It is very easy to create such a bootable CD ISO image in Linux using the mkisofs tool1. Run a command as follows:

Where *.IMG is the name of the image file extracted above. This creates a CD with one file on it and marks that file as the boot image.

You can now burn the bootcd.iso to a CD in your favorite CD-burning program.

ATTENTION!

By following any of the instructions here you are accepting the very real risk of turning your ThinkPad into a big expensive paper weight, as a firmware update gone wrong can create unfix-able problems. Proceed at your own risk!

Successful tests

George Tellalov <gtellalov_dontspamme@bigfoot.com>. BIOS 1.16 from spsdin36.exe worked perfectly with the method bootable cd from floppy image. I highly recommend this upgrade because it made my ibm-acpi module load (it wouldn't load before) and fixed some suspend to ram problems. Here's the cd image I used. Use at your own risk. You can send me a chocolate if it works for you ;)

Mike Vincent<matchstc-putobvioushere.com>. Bios 1.16 from spsdin36.exe and then to the boot cd worked great for me. Thought I had bricked it three separate times using a "real" floppy! Each from different diskettes .The updater would start, give me the "going to take30 seconds" speech...and then access the HD for 10 minutes. Each time it would reboot fine. Did the cd as described above...worked great first time. Perhaps 10 year old seldom used floppy disc drives have some challenges?

Andy Barnes <andy@RemoveThisToMailMe.itchypaws.co.uk>. As per Jonathan above, extracted BIOS 1.11 from spsuit55.exe using cabextract, created a CD boot image and burnt to CD. Worked flawlessly - thanks to everyone who contributed to this article!

Amit Gurdasani <gurdasani at yahoo dot com>. BIOS 1.13 flashed fine with cabextract/CD method. Alarmingly, after the BIOS update, the laptop beeped but did not shut down as was indicated onscreen -- that was frozen on the "do not shut down the laptop" screen. On power down and up again, the BIOS setup showed the newer BIOS image running, and Linux booted up fine. Linux ACPI didn't complain about the BIOS being too old either.

Vladimir Pycha (to Bios 3.23 / EC 3.04, from Bios 3.20 / EC 3.04) using nondisk/cabextract/CDRW. Booted with external USB optical drive (I have internal drive broken) - at the beginning of the boot sequence press PAUSE, then wait several seconds, then ENTER, then F12 and select the drive. Without pressing PAUSE I am not able to boot from USB optical/hard drive as the drive does not show in the F12 boot list menu.

cabextract & unetbootin are staight foward(toggle floppy image instead of iso image in unetbootin dialog)
No problems with update software.
x31 has to be cajoled into booting from usb. Boot hangs when pendrive is present. Hit the key to bring up the boot menu.
Unplug the pendrive. Let the boot menu come up. Plug in the pendrive. Select the pendrive in the boot menu and it boots.

If both BIOS and ECP are to be updated, be sure to update them in the proper order.

ATTENTION!

By following any of the instructions here you are accepting the very real risk of turning your ThinkPad into a big expensive paper weight, as a firmware update gone wrong can create unfix-able problems. Proceed at your own risk!

Reboot your computer, entering the GRUB menu and selecting IBM BIOS Update, or whatever you named the new section in /boot/grub/menu.lst.

Unsuccessful tests

Boots into the BIOS flashing program just fine, but when it comes time to start the update process, the system hangs completely. Luckily, it hangs before it actually modifies anything... A hard reboot got me back into a working system. I would not recommend this route!

GRUB2 Boot CD Image

Download the bootable iso file from the Lenovo Website. Copy the file 'memdisk' from the syslinux package to /boot. Also create a symlink, so you do not have to change the grub configuration for each bios upgrade:

Unuccessful tests

Grub2 + memdisk (2:4.01+dfsg-3ubuntu1) booted the DOS image on the CD, which then tried to load a DOS CD-ROM driver, which then could not find the CD, and ended up with the infamous Abort, Retry, Fail.

Booting from a Floppy

ATTENTION!

Using a floppy disk is NOT recommended.

This is how IBM/Lenovo intended it. Use their .exe files to create a bootable floppy with the flash update on it. Boot from the floppy and there you go.

So, why is it not recommended?

If something goes wrong, your ThinkPad may be permanently damaged

Floppy disk drives are not reliable

Floppy disks are not reliable

It only works with /dev/fd0, meaning it won't work with a USB floppy

So, even though Lenovo is now offering "Linux diskette" updaters, that will create a bootable floppy under Linux, using a floppy is still not recommended. Besides, many people don't even have a floppy drive on their ThinkPad.

If you really want to do it with a floppy, some tips:

Use a clean (in the physical sense) floppy drive

Use new floppies

Test floppies for errors before starting update process

Have multiple copies of the update disks ready--if one should fail, replace it with a copy

Should DOS complain of a read error, only respond wth "Retry"

NOTE!

Should the system encounter a disk read error during the flash process, and you select "Abort", your system could be permanently damaged.

Booting from a USB Flash drive

Updating the BIOS in MS-DOS mode

(This process works for most Thinkpad models that has Windows XP, Windows Vista or Windows 7 OS)

2. Extract the (*.ima) from the ISO BIOS image (e.g. WinRAR will do this).

3. Using a tool that can open .IMA files (such as WinImage), extract all files to a temporary folder.

4. Run the HP tool, select the USB device, I used FAT32, create a DOS bootable disk and point at the win98boot folder - then "Start". Warning: this formats the USB flash drive and all data will be erased!

5. Once complete (you could test if it boots at this point), copy the extracted BIOS files from the temporary folder you created to the USB flash drive.

6. Boot from USB flash drive by pressing F11 within the BIOS boot logo. At the DOS command prompt, type "updflsh" and then follow the prompts by pressing "Y" or Enter. Make sure that you have a fully charged battery pack and the AC Adapter is firmly plugged before proceeding with the BIOS update.
DO NOT Power off the laptop or unplug the USB flash drive while the update is in progress or else update will fail and your computer will be unable to boot and system board may need to be serviced.

This process takes around 1-2 minutes. A long beep followed by a short beep will notify you that the update is complete and the system will automatically power off.

7. Power on the laptop then enter the BIOS setup by pressing F1 and Load BIOS defaults.

Using grub4dos (also for Linux)

grub4dos is a GNU GRUB fork with interesting features. One of them is the ability to boot ISO images directly off USB flash drives. Contrary to the name, GRUB for DOS works fine on Linux. Follow these steps:

Run sudo ./bootlace.com /dev/sdX, where /dev/sdX is the device name assigned to your pendrive (use sudo fdisk -l to figure this out). Be very careful to get the device correct or else you could overwrite your hard drive! This creates grub4dos boot sector in MBR of the flash drive.

Copy the files grldr and menu.lst to the root directory of your pendrive.

If all went well, you should be able to boot the Thinkpad's ISO image and flash the BIOS. I tested it successfully on T400. Wanted 20:23, 16 July 2010 (UTC)

Using UNetbootin

Unetbootin 422 worked with the image files unpacked with cabextract on my x31.

Help needed

How exactly did you do this? It failed for me. Does it work only with .IMG files that are converted to .ISO files, or can .ISO files provided by Lenovo also work (how?)

Booting from a Network Boot Image

BIOS, ECP, CD/DVD and Harddisk firmware disks can be booted over the network with PXELINX as part of the SYSLINUX package. This requires that you have a DHCP and tftp server configured and setup properly on your network, and is probably not for the faint of heart.

Make sure the firmware bootdisk is in linux 'dd' format, as the self-extracting .exe disks from the IBM website cannot be booted directly as such.

This worked on the R31, X22, T21, T30 and T41p with various firmware updates. On the X22, it worked with ECP 1.30 but not with BIOS 1.32

Updating without battery or with dead battery

This is a last-resort approach. Use this only if everything else fails.

The BIOS updater may refuse to update a BIOS without a battery, or if the battery charge is too low. In that case, extract the disk image with cabextract as per instructions above and dd it to an usb stick. (This will destroy the data on it, of course.) Acquire a pure DOS boot cd such as Windows 98 recovery CD and boot that.

Use F8 to abort the boot sequence of a windows 98 boot CD. If you need CD-ROM support, load CD-related things but say no to everything else. In particular, avoid loading himem.sys and doskey, as the presence of either program causes Phoenix bios flash tool phlash16.exe to abort.

Change to the volume where flash2.exe and other tools are installed, and execute "flash2.exe /u". This should bypass the battery check and perform the flashing. If that doesn't work, check if the update disk contains a tool called "phlash16.exe". This can be used directly to flash the image, and the invocation is typically "phlash16 /exit $01c80000.fl1".

This method won't work for the Thinkpad 560X (and likely other older models). Since the 560X is a bit older, it won't be a big surprise if the battery is dead as a dodo. Here's how to update the bios in this case: download the spsdi833 bios update and create the update floppy. If you have trouble creating this disk, download an archive with the files and put them on a floppy. Don't worry about making it bootable. Also, you will need a DOS bootdisk. A Windows 98 bootdisk will be fine. Boot the system with the W98 bootdisk, do not load CD-rom support. Remove the W98 bootdisk and put the disk with the BIOS update in the drive. If you would now run UPDTFLSH you would get the battery message, so don't do that. If you open UPDTFLSH.exe with a text editor, you would find some lines about UPDTROM. UPDTROM is the actual flash tool, but you can't simply run it just like that. Run the following:

updtrom /np /prep1

updtrom /np /prep2

updtrom /np /prep3

updtrom /np /romcmp /romflsh /prep4

updtrom /np /h8flsh /h8img /model

Yes, you need to run updtrom five times. Hold your breath and reboot the machine. It's done.

Perhaps not all these lines are necessary, but to be sure I ran them all, and this worked for me. So I suggest you do the same. This could probably be done from the harddisk as well, but I did not test that.

After updating

DMI IDs

Special Cases

In one case, see (APM setup on a type 2379 ThinkPad T40), it was not possible to upgrade the BIOS from Windows XP; a downgrade to Windows 98 was required to successfully run the BIOS upgrade app. The symptoms in this case were that, once the files had been extracted to the hard disk, and the machine was to reboot into the upgrade app, it would beep and hang just before reboot, requiring a power cycle. Once the power was cycled, it would simply reboot back into XP without performing any BIOS upgrade actions. So even if you have Windows, you may still need to use the info on this page.